I just put some on for the first time this year, i plan on skiing as much as possible and some spots in co can be real sketch in a storm so i a figured studded tires and a forester should be pretty solid. I can't tell you to much as pros and cons as its my first time with them but i guess cons is their alot louder on the road, and i heard they hurt mpg but not too sure, pros...shit ya got spikes on your tires your gonna grip real fuckin well on ice and snow.
Where do you live? A lot of states don't allow studded tires, though I would assume that since you are asking they are legal in your state.
That being said, I live in MI and studded tires are pretty much illegal in the LP. When I bought my car last year, it came with a set of Bridgestone Blizzak tires. They are absolutely amazing! They ride so well in the winter, and they have a ingeniously designed tread pattern that gives them comparable traction to studded tires. I have never slipped out with my Blizzak's no matter how bad the storm. One time I was driving home for the weekend and I saw about 30 cars in the ditch over 40 miles, about half of which were 4x4. My WRX coupled with the Blizzaks never slipped, skidded or had the ABS kick in once. I would definitely recommend them if you have the cash (About $115 per tire I think).
"Yesterday is a memory, Tomorrow is a mystery; I only live for the moment."
If you live in a place where roads are all cleared, you don't need studs, in fact, studs suck on asphalt ans snow. Indeed, there is nothing that can beat studded tires on ice, but i doubt you're always on fucked up roads. Good winter tires are the way to go, much more polyvalent! Anyway, if you drive like a moron you could have 6in studs lol and crash the car no matter what, so your driving will affect a lot the driveability of your car in winter!
They give you significantly better traction and control in the snow, not as easy for the tires to spin and get stuck, and they won't just slide across the ice and snow when braking. If you're on a dry road though, the studs get worn out fast, also most snow tires are a softer rubber I think, so the rubber will have better grip in the cold when an all-season would be really hard. That would make the rubber deteriorate faster on a dry road as well. as far as other cons go, they are expensive, but I say it is worth it, for less possible winter driving mishaps.
"you name it, I bang it"-GRFreeskier, on afterbang